@book{7369,
	author = {Chernick, Michael R. and Friis, Robert H.},
	title = {Introductory biostatistics for the health sciences :},
	publisher = {Wiley-Interscience,},
	year = {c2003.},
	address = {Hoboken, N.J. :},
	url = {http://www.loc.gov/catdir/bios/wiley043/2002152378.html}
}